Night report 2025-01-22

Observers: Simon de Wet, Hannah Wichern

Support: Giorgos Leloudas

TAT:  Sara Faris, Thallis de Lourenço Pessi, Giuliano Pignata

Beginning (UT 01:15): relative humidity = 46%, temperature = 14.50 degrees Celsius, windspeed = 2.90 m/s, seeing = 0.39”

Middle (UT 05:00): relative humidity = 41%, temperature = 15.20 degrees Celsius, windspeed = 1.80 m/s, seeing = 0.42”

End (UT 08:35): relative humidity = 40%, temperature = 13.80 degrees Celsius, windspeed = 4.1 m/s, seeing = 0.49”

Calibrations: Bias, dome flats, arcs (gr#11, gr#13, gr#13+GG495, gr#16, gr#16+OG530, gr#18) done on morning 23/01 only due to absence daytime operator on 22/01.